STUDIES ON THE SYNERGISM OF BENZOXAZOLE FLUORESCENT WHITENING AGENTS

The fluorescence spectra and fluorescence lifetimes of benzoxazole flu orescent whitening agents (FWAs) in DMF have been measured. The relati onship between molecular structure and photophysical properties are di scussed. The Dember photovoltages of FWAs adsorbed on a p-type silicon single crystal were also measured. It was found that there exists an interaction between two FWAs compounds; the synergism of the compounds was investigated by a study of energy transfer and charge carrier tra nsfer.